package com.lagou.config;

import com.lagou.io.Resources;
import com.lagou.pojo.Configuration;
import com.mchange.v2.c3p0.ComboPooledDataSource;
import org.dom4j.Document;
import org.dom4j.DocumentException;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

import java.beans.PropertyVetoException;
import java.io.InputStream;
import java.util.List;
import java.util.Properties;

public class XMLConfigBuilder {
    public static Configuration parseConfig(InputStream is) throws DocumentException, PropertyVetoException {
        Document dom = new SAXReader().read(is);
        Element rootElement = dom.getRootElement();
        List<Element> propertyList = rootElement.selectNodes("//property");
        Properties properties = new Properties();
        for (Element element : propertyList) {
            String name = element.attributeValue("name");
            String value = element.attributeValue("value");
            properties.put(name,value);
        }

        ComboPooledDataSource comboPooledDataSource = new ComboPooledDataSource();
        comboPooledDataSource.setDriverClass(properties.getProperty("driverClass"));
        comboPooledDataSource.setJdbcUrl(properties.getProperty("jdbcUrl"));
        comboPooledDataSource.setUser(properties.getProperty("username"));
        comboPooledDataSource.setPassword(properties.getProperty("password"));

        Configuration configuration = new Configuration();
        configuration.setDataSource(comboPooledDataSource);

        List<Element> mapperList = rootElement.selectNodes("//mapper");
        for (Element element : mapperList) {
            String resource = element.attributeValue("resource");
            InputStream is2 = Resources.getResourceAsStream(resource);
            XMLMapperBuilder.parseConfig(is2, configuration);

        }

        return configuration;
    }
}
